New to Forum/ Chrysler Conqueror 135 Project

[ExplorGM]

Hi, I am new to the forum so I apologize in advance for any etiquette errors... I have a 1975 Chrysler that I acquired in a trade a couple years ago. Seller listed it as a 130hp model and the engine cover is for a 130. Its been sitting waiting it's turn. (working on a 1972 Aquarius sailboat that is now in the water, a 63 Chevy C10 and 69 Buick Convert. too many projects) The motor starts immediately and runs, lots of new upholstery, and carpeting done by me and the kids. New fuel components from tank to motor. Started looking for an impeller and/or kit and came across an interesting problem. The tag lists the motor as 707HA, but the powerhead is a 4 cylinder so can't be a 70hp? Must have been swapped at some point. Block stamping on top is 476. I am told that this might help to identify the motor? Told it could be anything from a 105 to a 140? Anyone have access to block ID lists? It does have the smaller WB carbs (2) so these may have come off another motor? Trying to post small .25mp photos but keep getting an error message. Maybe I am too new to post photos?

 

[alldodge]

Howdy
There is an issue with the site and uploading pics, no ne can do it now. Were all looking forward when the folks get it working again

The 105 and 140 are both 4 cyl

The 707HA is a 1970 - 70hp
https://maxrules.com/ChryslerModels/50_85.html

 

[ExplorGM]

And the 70hp is a 3 cylinder motor so we know that tag is not correct as it stands now. Just wondering what it really is? 105, 120, 130, 135, 140? Does the 476 stamping on the block indicate a 1976 year?

 

[ExplorGM]

It has the magna power ignition but that is disconnected and it is running off an automotive coil now.

 

[alldodge]

My guess its a 105 because there was so many, but need another with more knowledge then me. I have a 105 and what we think is a 120 (has digital ignition) and one of these days I'm going to finish putting my 105 Conqueror back together

 

[ExplorGM]

Ok, thanks.

 

[jerryjerry05]

Since they used a 130-135 cover I'd guess it's that?
The cover for the 70, no way would it fit the 4cyl.

Photoshop or any photo sharing site will help post pics.

Top of the stbd.side of the engine should be a foundry stamp.
The #s in the center of the stamp should be the year.
You'll have to pull the head and check the bore to tell what HP.

 

[Nordin]

You have to check the bore.
All 4 cylinders except the 115Hp 1978-1980, 135Hp and 140Hp have 3,375 in bore.
The other 100, 105, 115 120, 125 and 130Hp have 3,312 in bore (same as the 3 cylinder 70, 75, 85 and 90Hp).
From there you know a little bit more, some these 4 cylinders with 3,312 in bore were not made in those years around 1975-76.

 

[alldodge]

Pic uploads have been fixed

 

[Nordin]

Sorry for my confusing answer in #8.
I will clarify, all 4 cylinders except the 115Hp 1978-80 all 135Hp and 140Hp have 3,312 in bore.
The 115Hp 1978-80, all 135Hp and 140Hp have 3,375 in bore.

 

[ExplorGM]

[No message]

 

[ExplorGM]

Thank you for the information! Pulling the impeller and doing a compression test this week hopefully. If compression is reasonably even and not too low in all 4 cylinders I probably won't pull the head. The seller claimed 120 in all 4 cylinders, but given that he did not mention anything about the powerhead swap its probably BS. If compression is really bad then we might pull the head.
Thanks again!

 

[jerryjerry05]

Nordin, YOU DA MAN!!!
I was trying to look up the sizes but not having the best of luck.

Compression, as long as all 4 are within 5# I'd say you should be OK.
You gauge might only read 100# my gauge would read at 150#
The important thing is all 4 need to be close.

Sold a 2002 225 Mercury
The prospective owner had a NEW tester from Harbor Freight.
He says I wanna try my new gauge, I know this will tell the comp.

He does the first 2 and gets 85# should be 150#
He says the compressions way low and doesn't want to buy the motor.

I take his tester and move it out of the way.
Hook up mine. 'Get 150-155 all 6 cyl.
He took the HF tester back and bought the motor.

Cheap tools?? Poor results.

 

[Nordin]

To know the size of the block you have to measure the bore and maybe check the carbs and the jetzs in there.
The preowner may just have change the lower cowl or put a 4 cylinder block on a 70Hp 1970 (707HA) leg.
The 4 cylinder block fits right on a 3 cylinder leg and visevers.
Locking at the design of the hood and the colours of it, it is from 1972-73 and the lower leg gear case is from 1972 and earlier.
1973 and later 2 piece gear gase had a more rounded design at the back where the lower unit fits to the mid leg (split line).

 

[ExplorGM]

Good information JerryJerry! Nordin- your info sounds just about right! Crazy mishmash. 74 hull (and trailer), 70 lower case, 72-73 hood, possibly 76 block... Numerous stampings and part numbers attached. Franz thinks the 476 on the top of the block may indicate some identification information. My guess would be the year...?

 

[jerryjerry05]

Top of the block where the pack/ignition goes and under the bottom carb on the intake is
a foundry stamp. The numbers in the center are the year of the block.

 

[ExplorGM]

Is it safe to run a cold compression test without the lower unti attached? We took it off last night to get the impeller ou for replacement. Drained lubricant also. Came out with a dark green tint. No grey or milky indications.
Assuming it is ok but wanted to check and see if anything woudl come apart without the driveshaft up in there?

 

[ExplorGM]

These are from lower carb and upper carb respectively. Lower is the first photo. Both appear to be the same. Center numbers seem to be 81?

 

[ExplorGM]

Can't find the numbers around the ignition pack...

 

[ExplorGM]

Found the number 1977 behind the ignition. Doesn't jibe with numbers below carbs unless the parts were mixed and matched from different blocks.